P0401 EGR insufficient flow A detection

[LogicprObe]

I have had that error and light on for nearly 2 years now.
Just clear it and keep driving.
The thing you need to monitor is if there is coolant loss.
Then you have to change it straight away.

The trouble it takes to remove it, you're better off to whack a new one in.
My last one was about $700 from VW..........took me about half a day to change it.

Here's an excellent instruction video.

Volkswagen Transporter T5 2.0 TDI EGR COOLER Replacement and post-mortem - YouTube

[Exocet]

There's lots of no brand $200 Egr valves on Ebay that claim to have the same part no. as the OEM 'Valeo' fitted to mine.
Any one fitted one?